GLSA 200504-12: rsnapshot: Local privilege escalation
Posted on: 04/13/2005 02:59 PM

A rsnapshot security update is available for Gentoo Linux

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Gentoo Linux Security Advisory GLSA 200504-12
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http://security.gentoo.org/
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Severity: High
Title: rsnapshot: Local privilege escalation
Date: April 13, 2005
Bugs: #88681
ID: 200504-12

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Synopsis
=======

rsnapshot allow a local user to take ownership of local files, resulting in privilege escalation.

Background
=========

rsnapshot is a filesystem snapshot utility based on rsync, allowing local and remote systems backups.

Affected packages
================

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Package / Vulnerable / Unaffected
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1 net-misc/rsnapshot lt; 1.2.1 gt;= 1.2.1

Description
==========

The copy_symlink() subroutine in rsnapshot follows symlinks when changing file ownership, instead of changing the ownership of the symlink itself.

Impact
=====

Under certain circumstances, local attackers can exploit this vulnerability to take ownership of arbitrary files, resulting in local privilege escalation.

Workaround
=========

The copy_symlink() subroutine is not called if the cmd_cp parameter has been enabled.

Resolution
=========

All rsnapshot users should upgrade to the latest version:

# emerge --sync
# emerge --ask --oneshot --verbose "gt;=net-misc/rsnapshot-1.2.1"

References
=========

[ 1 ] rsnapshot Security Advisory 001
http://www.rsnapshot.org/security/2005/001.html

Availability
===========

This GLSA and any updates to it are available for viewing at the Gentoo Security Website:

http://security.gentoo.org/glsa/glsa-200504-12.xml

Concerns?
========

Security is a primary focus of Gentoo Linux and ensuring the confidentiality and security of our users machines is of utmost importance to us. Any security concerns should be addressed to security@gentoo.org or alternatively, you may file a bug at http://bugs.gentoo.org.

License
======

Copyright 2005 Gentoo Foundation, Inc; referenced text belongs to its owner(s).

The contents of this document are licensed under the Creative Commons - Attribution / Share Alike license.

http://creativecommons.org/licenses/by-sa/2.0



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